Apparatus for lasting shoes and covering panels



April 11, 1961 J. 5. KAMBORIAN APPARATUS FOR LASTING SHOES AND COVERING PANELS Filed July 16, 1958 m wor @005 iiwyzfiarm N wm on an inclined shaft;

APPARATUS FOR LASTING SHOES AND COVERING PANELS Jacob S. Kamborian, West Newton, Mass. International Shoe Machine Corp., 292 Main St, Cambridge, Mass.)

Filed July 16, 1958, Ser. No. 748,971

6 Claims. (Cl. 12-8.3)

This invention relates to machines of the kind in which a pair of rolls turning in opposite directions are arranged to grip the opposite sides of the margin of a flexible material applied to a form and to pull the margin over the edge and simultaneously to advance the work linearly, for example, as shown in the shoe lasting machine and panel covering machine ofmy Patents Nos. 2,576,121 and 2,571,140 granted November 27, 1951 and October 16, 1951 respectively and in US. pending application Serial No. 529,247, filed August 18, 1955 in the names of Thomas A. Weisz and Jacob S. Kamborian.

It is the primary purpose of this invention to improve the drafting stresses on the margin by providing means for more accurately adjusting the pull according to the character of the work, to provide means which will permit closer control and to provide means which will make it possible to duplicate the pull for a given material without trial and error.

As herein illustrated, the rolls are mounted for movement to and from each other and there is fluid pressure operated means for varying the pressure of the rolls on the work and means for varying the pressure of the pressure fluid delivered to the fluid pressure operated means, so that the pressure on the work may be accurately controlled. There is also means associated with the rolls for limiting the spacing between them so that the spacing may be varied according to the thickness of the work. 1

The invention will now be described in greater detail with reference to the accompanying drawings wherein: Fig. l is a fragmentary side elevation of the upper part of the machine showing the work engaging rolls with the fixed roll on a perpendicular shaft and the movable roll Fig. 2 is a horizontal section taken on the line 2-2 of Fig. 1;

Fig. 3 is an enlarged diametrical section of the micrometer screw adjustment; and

Fig. 4 diagrammatically shows thedrive for the feed "rolls. x Referring now to the drawings, Fig. 1, thereis shown a bracket which supports a'pair of feed rolls for engagement with the oppositesides of, the work, with their axes' inclined frorn'righttdleft in the direction of movement of the work. The mounting for the bracket is shown in the aforesaid pending application, Serial No. 529,247.

The bracket has vertically spaced bearings in which there is journaled a shaft 12, the lower end of which carries a frusto-conical roll 14 and the upper end of which carries a driving member 16, such as a gear, which meshes with a gear 18 fastened to a horizontal drive shaft 20 also journaled on the frame. A slide 22 is arranged to move horizontally in a direction at right angles to the shaft 12 between spaced parallel tracks 24-24 on the frame and has at its forward end an inclined bearing for rotatably receiving the lower end of an inclined shaft 26, at the lower extremity of which is States Patent mounted a frusto-conical roll 28 for cooperation with the roll 14. At the upper end of the shaft 26 there is a gear 30 (Fig. 4) arranged to mesh with the gear 32 on the drive shaft 20. The inclined shaft 26 has a flexible section 33 in it so that it may be moved relative to the vertical shaft by movement of the slide to separate the rolls without interfering with the drive.

The rear end of the slide 22 has pivotally connected to it, as shown in Figs. 1 and 2, the forward end of a rod 34 which enters one end of a cylinder 36 and'carries within the cylinder a piston, not shown. Conductors 38 and 40 are provided at opposite ends of the cylinder for supplying a pressure fluid to move the piston in either direction and under normal conditions pressure supplied to the left-hand end of the cylinder so as to force the piston toward the right end and hence to urge the bearing, shaft and roll 28 carried thereby toward the fixed roll 14. The pressure fluid is air and hence the force applied is of a yielding nature and will not result in damage to the rolls or work in the event that something unyielding passes between them.

Air under pressure is supplied to the cylinder 36 from a source of pressure by way of a pressure regulator R, the latter being provided with an adjustable valve. A gauge G provides for visual indication of the pressure in pounds per square inch so that the exact amount of pressure supplied at any given time may be seen, varied according to the character of the work and duplicated as often as is desired.

The slide 22 is constrained in its movement by a cover plate 42 bolted to the frame against the outer side over the tracks 24--24 and has a laterally projecting hollow boss 44 in which is journaled a short shaft 46 with a portion extending inwardly thereof and a portion extending outwardly thereof. The inner portion of the shaft has a gear 48 fastened to it and this gear meshes with another gear 50 fast on an adjustable screw or shaft 52, journaled in spaced bearings 54 56 at the inner side of the plate which support the shaft 52 with its axis parallel to the direction of movement of the slide. The gear 50 is splined on the shaft 52 and the right end of the shaft 52 is threaded in the bearing 56, so that rotation of the gear 50 produces axial movement of the shaft 52. An abutment 58 is provided onthe slide which extends laterally into a position in alignment with the left end of the shaft 52, so that'by advancing the shaft against the abutment the slide may be moved forwardly thus to separate the roll 28 from the roll 14. The spacingrmay .be varied at, will and at any given spacing the inclined roll is always urged toward the fixed rollby the pressure existingin the fluid motor. a

To'facilitate accuracy of adjustment and duplication 1101 1 1 with. t .bY-dme ns o -ia s r n er! arr edsb a knob and frictionally engaged with the sleeve. There are graduations 66 on the sleeve movable by turning the sleeve relative to a mark 68 on the edge of a bearing 70 bolted to the boss 44 through which the shaft 46 passes. For sight adjustment to the approximate spacing desired the knob 60 is rotated without reference to the scale. When the approximate spacing has been obtained the knob is held stationary and the sleeve is rotated to bring its zero mark opposite the mark 68, whereupon adjustment of the spacing may be accomplished in fractions of an inch by then rotating the knob and sleeve in unison a given number of graduations in either direction with reference to the mark 68.

As previously explained, air is normally supplied to the left end of the cylinder 36 so that-the slide is urged toward the right and the roll 28 is yieldably urged toward the roll 14, being held spaced therefrom by engagement of the abutment 58 with the left end of the shaft 52. When it is desirable to separate the rolls by an amount greater than the adjusted spacing, for example to facilitate introducing the work, air may be supplied to the opposite end of the cylinder 36 through the conduit 40. Interconnected valves V and V2 are provided for venting one end of the cylinder when air is supplied to the other.

In operation of the machine there will be available in formation on the thickness of the Work, that is, the flexible cover material and the pull that can be exerted thereon without damaging it and at the same time which will be sufiicient to accomplish the pulling over operation Wanted. Having these figures the operator can easily ad just the machine quickly and effectively by turning 'the graduated knob 60 to space the rolls properly according to the thickness of the work and the valve on the pressure regulator R to establish the desired pressure between the rolls with an accuracy which has heretofore been im possible and which can be duplicated as contrasted to prior machines wherein trial and error was the only method of establishing proper operating conditions.

Both the spacing of the rolls and the pressure with which they are urged toward each other is of special importance in handling synthetic materials because they are quite thin, easily torn and slippery. To obtain the proper grip without damage therefor requires much greater accuracy of adjustment than can be obtained by sight hence the foregoing means is especially suitable for covering panels and shoes where synthetic materials 'areused.

It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications and equivalents which fall within the scope of the appended claims.

I claim:

1. In a machine of the kind in which a pair of rolls are arranged to have contact with the opposite sides of the margin of flexible material passing between the rolls, a frame, a slide, on which one of the rolls is carried, means movably mounting said slide in the frame, an abutment provided by the slide intermediate its ends, said abutment facing away from the slide-carried roll, a shaft having an end facing the abutment and the slide-carried roll, and means engaged with the end of the slide remote from the slide-carried roll for yieldably urging the abutment against said shaft end.

2. In a machine of the kind in which a pair of rolls I are arranged to have contact with the opposite sides of the margin of flexible material passing between the rolls, a frame, aslide, on which one of the rolls is carried,

means movably mounting said slide in the frame, an abutment provided by the slide intermediate-its ends, said abutment facing away from the slide-carried roll, a shaft having an end facing the abutment and the slide-carried roll, and a fluid operated motor connected to the end of the slide remote from the slide-carried roll for yieldably urging the abutment against said shaft end. f

3'. In a machine of the kind in which a pair of rolls'are arranged to have contact. with the opposite sides of the margin of flexible material passing between the rolls, a frame, a slide, on which one of the rolls is carried, means movably mounting said slide in the frame, an abutment provided by the slide intermediate its ends, said abutment facing away from the slide-carried roll, a shaft having an end facing the. abutment and the slide-carried roll, means carried by the frame for adjusting the shaft towards and away from. the slide-carried roll, and means engaged with the end of the slide remote from the slide-carried roll for yieldably urging the abutment against said shaft end.

4. In a machine of the kind in which a pair of rolls are arranged to have contact- With the opposite sides of the margin of flexible material passing between the rolls,

a frame, a slide, on which one of the rolls is carried, means movably mounting said slide in the frame, an abutment provided by the slide intermediate its ends, said abutment facing away from the slide-carried roll, a shaft having an end facing the abutment and the slide-carried roll, means carried by the frame for adjusting the shaft towards and away from the slide-carried roll, and a fluid operated motor connected to the end of the slide remote from the, slide-carried roll for yieldably urging theabutment against said shaft end.

5. In a machine of the kind in which a pair of rolls are arranged to have contact with the opposite sides of the margin of flexible material passing between the rolls, a frame, a slide, upon which one of the rolls is carried, means movably mounting said slide in the frame, an abutment provided by the slide intermediate its ends, said abutment facing away from the slide-carried roll, a shaft threaded intothe frame, said shaft having an end facing the abutment and the slide-carried roll, a knob rotatably mounted in the frame, a gear, means connecting said gear and said knob for rotation in unison, a second gear splined to the shaft meshed with the first mentioned gear, an air operated motor connected to the end of the slide remote from the slide-carried roll, means for admitting air under pressure to said motor to yieldably urge the abutment against said shaft end, and a pressure regulator associated with the last mentioned means for varying the pressure of the air admitted to said motor.

6. A machine according to claim 5 having a sleeve with graduations thereon associated with the knob, means mounting the sleeve for rotation relative to theknob, a base mark on the frame, said base mark being registerable with said graduations, and spring means carried by the knob and 'frictionally engaged with the sleeve, whereby the sleeve can be rotated until a desired graduation registers with base mark, after which the knob and sleeve can be rotated in unison to thereby shift the shaft a corresponding amount.

References Cited inthefile of this patent UNITED STATES PATENTS 2,326,193 Baker Aug. 10, 1943 2,611,150 Goulding Sept. 23, 1-952 ,FOREIGN PATENTS 721,144 -.Great Britain Dec. 29, 1954 

